package collection;

import javafx.print.Collation;

import java.util.ArrayList;
import java.util.Collection;

/**
 * 演示contains方法
 */
public class CollectionDemo2 {
    public static void main(String[] args) {
        Collection c = new ArrayList();
        c.add(new Point(1,2));
        c.add(new Point(3,4));
        c.add(new Point(5,6));
        c.add(new Point(7,8));
        c.add(new Point(9,0));
        boolean b = c.add(new Point(1,2));
        System.out.println(b);
        System.out.println(c);



        /*
        boolean contains(Object o)：
        判断依据是给定元素与当前集合元素是否存在equals()为true的情况
         */
        Point p = new Point(1,2);
        boolean contains = c.contains(p);
        System.out.println(contains);//true

        /*
        boolean remove(Object o)：--------一般都不接收boolean结果
        从当前集合中删除与给定元素o的equals()比较为true的元素，删除成功为true，否则为false
        若存在重复元素则只删除第一次匹配的元素
         */
        boolean remove = c.remove(p);
        System.out.println("是否删除："+remove);
        System.out.println(c);

























    }
}
